一种双站后向散射系统结构及其FSK调制和接收  

A bistatic backscattering system and its FSK modulation and receiving

作　　者：董宜焕 隋栋 DONG Yihuan;SUI Dong(Department of Health Management,Zhengzhou Shuqing Medical College,Zhengzhou Henan 450064,China;School of Electrical and Information Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]郑州澍青医学高等专科学校卫生管理系,河南郑州450064 [2]北京建筑大学电气与信息工程学院,北京100044

出　　处：《太赫兹科学与电子信息学报》2021年第3期412-418,共7页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金青年项目资助(61702026)。

摘　　要：为了实现需要大量无线传感器覆盖和大的通信范围的应用,本文提出了一种双站后向散射系统结构及其基于移频键控(FSK)的非相干调制方案。首先对双站后向散射系统结构的后向散射信号和信道模型进行了详细分析;然后在此基础上针对功率受限情形提出了基于FSK的非相干调制和克服采用双站结构带来的载波频率偏移技术;最后给出基于FSK的接收机链路和误码率(BER)计算。实验结果表明,本文提出的双站后向散射结构及其基于FSK的调制解调技术不仅具有较好性能,而且具有较大通信范围潜力,适用于大规模、功率受限的传感器网络。A bistatic backscattering system architecture and its noncoherent modulation scheme based on Frequency Shift Keying(FSK)are proposed in order to realize the applications requiring large amount of wireless sensor coverage and large communication range.Firstly,the backscattering signal and the channel model for the bistatic backscatter system architecture are analyzed in detail.Then,on this basis,an FSK based noncoherent modulation and techniques to overcome carrier frequency offset introduced by the utilization of bistatic architectures are proposed for power-constrained cases.Finally,the receiver chains based on FSK and the Bit Error Rate(BER)calculation are provided.The experimental results show that the proposed bistatic backscattering architecture and its FSK based modulation and demodulation technologies not only have good BER performance,but also have the potential of large communication range,which is applicable for large-scale and power-constrained sensor networks.

关 键 词：无线传感器网络 射频识别 双站结构 后向散射 移频键控 误码率 通信范围 

分 类 号：TN014[电子电信—物理电子学]